*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Manrope', sans-serif;
}

main{
  display: grid;
  grid-template-columns: 1fr;
  width: 90%;
  margin: 0 auto;
  gap: 1rem;
}

h1 {
  color: #0F0F0F; 
  letter-spacing: 0.04em;
  font-family: "Source Code Pro", sans-serif;
  margin: 1em 0 1em 5%;
}

h2 {
  font-size: 0.88rem;
  color: #5D0E50;
  letter-spacing: 0.065em;
  text-transform: uppercase;
}

h3 {
  font-size: 1rem;
  margin: .4em 0;
  letter-spacing: 0.03em;
  color: #111111;
  font-weight: 500;
}

p {
  margin: 0;
  font-size: .85rem;
  color: #7c7c7c;
}

a {
  text-decoration: none;
}

a:hover, a:focus {
  filter: brightness(0.9);
}

a:focus {
  outline: 3px solid #5a5a5a;
  box-shadow: 0 0 0 3px rgba(135,18,113,0.5); 
  transition: outline 0.2s ease, box-shadow 0.2s ease;
}


article {
  border-radius: 0.2em;
  background-color: #e5e5e5;
  height: 100%;
}

.article-header {
  padding: 1em;
  width: 100%;
}

img {
  width: 100%;
  border-top-left-radius: .2em;
  border-top-right-radius: .2em;
}


footer{
  margin-block: 1rem;
  text-align: center;
}

@media (min-width:600px){
  main{
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(4, 1fr);
  }
  .technology{
    grid-column: span 2;
    grid-row: 1 / 2;
  }
  .environment{
    grid-column: 1 / 2;
    grid-row: 2 / 3;
  }
  .nasa{
    grid-column: 2 / 3;
    grid-row: span 2;
  }
  .health{
    grid-column: span 2;
  }
}

@media (min-width:850px){
  main{
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 1fr);
  }
  .technology{
    grid-column: span 2;
    grid-row: 1 / 2;
  }
  .environment{
    grid-column: 3 / 4;
    grid-row: 1 / 2;
  }
  .nasa{
    grid-column: 4 / 5;
    grid-row: span 2;
  }
  .physics{
    grid-column: 1 / 2;
    grid-row: 2 / 3;
  }
}